Self-Employed Retirement Plans Estimate the maximum contribution amount for a Self-Employed 401(k), SIMPLE IRA, or SEP. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Medicare At 65+ 65 or older? It may be time to enroll in Medicare. Read to learn if you’re eligible. A Cheat Sheet for Sending Your Kid to College Dropping off your child is loaded with emotions; here are a few tips for a smoother experience. Four Steps to Valuing an Estate Determining the value of your estate, or for someone who has passed away, can be a complex undertaking.